纳米MgO粉煤灰混凝土的力学性能研究

Mechanical properties experiment research of nano-MgO fly ash concrete

采用粉煤灰、纳米MgO单掺和复掺2种形式对混凝土的力学性能进行了试验研究。试验结果表明:粉煤灰对混凝土前60 d龄期的立方体抗压强度不会产生显著的影响;120 d龄期时,20%的粉煤灰掺量对立方体抗压强度的影响优于10%掺量。纳米MgO的掺量为2%以内时可以改善混凝土的力学性能,1%为最佳掺量。当两种材料复掺时,粉煤灰和1%的纳米MgO复掺可以获得最优的试验效果。

The mechanical properties experiment research of concrete have been conducted by the single or compound blending of nano-MgO and fly ash.The consequences showed that fly ash didn,t have a significant influence on the compressive strength before 60 days;at the age of 120 days,the compressive strength of concrete cube elements,of which the 20%weight of cement were substituted by fly ash behaved better than that of 10%.The dosage of nano-MgO within 2%is beneficial to improve the mechanical properties of the concrete,in the meanwhile,the 1%is optimal dosage.Optimal experimental results of the compressive strength could be obtained with fly ash and 1%nano-MgO,when two kinds of materials were remixed.